A forearm fracture is a break in one or both bones of the forearm.

The forearm consists of two bones:

  • Radius—the smaller of the two bones, runs along the thumb side of your arm
  • Ulna—the larger of the two bones, runs along the little finger side of your arm

Forearm Fracture with Swelling
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A forearm fracture is caused by trauma to the bone. Trauma may include:

  • Fall on an outstretched arm
  • Fall directly on the forearm
  • Direct blow to the forearm
  • Twisting the arm beyond the elbow's normal range of motion